diff options
author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:13:14 +0000 |
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committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:13:14 +0000 |
commit | d0233291bc8a5068e52c69c210e5979e5324b5bc (patch) | |
tree | 7d9459449c33792c63eeb7baa071e76352e0baab /trunk/vm_eval.c | |
parent | 0dc342de848a642ecce8db697b8fecd83a63e117 (diff) | |
parent | 72eaacaa15256ab95c3b52ea386f88586fb9da40 (diff) |
re-adding tag v1_9_0_4 as an alias of trunk@18848v1_9_0_4
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18849 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'trunk/vm_eval.c')
-rw-r--r-- | trunk/vm_eval.c | 1346 |
1 files changed, 0 insertions, 1346 deletions
diff --git a/trunk/vm_eval.c b/trunk/vm_eval.c deleted file mode 100644 index 96a189ae85..0000000000 --- a/trunk/vm_eval.c +++ /dev/null @@ -1,1346 +0,0 @@ -/********************************************************************** - - vm_eval.c - - - $Author$ - created at: Sat May 24 16:02:32 JST 2008 - - Copyright (C) 1993-2007 Yukihiro Matsumoto - Copyright (C) 2000 Network Applied Communication Laboratory, Inc. - Copyright (C) 2000 Information-technology Promotion Agency, Japan - -**********************************************************************/ - -#include "ruby/ruby.h" -#include "ruby/node.h" -#include "ruby/st.h" - -#include "vm_method.c" - -static inline VALUE method_missing(VALUE obj, ID id, int argc, const VALUE *argv, int call_status); -static inline VALUE rb_vm_set_finish_env(rb_thread_t * th); -static inline VALUE vm_yield_with_cref(rb_thread_t *th, int argc, const VALUE *argv, const NODE *cref); -static inline VALUE vm_yield(rb_thread_t *th, int argc, const VALUE *argv); -static inline VALUE vm_backtrace(rb_thread_t *th, int lev); -static NODE *vm_cref_push(rb_thread_t *th, VALUE klass, int noex); -static VALUE vm_eval_body(rb_thread_t *th); -static void vm_set_eval_stack(rb_thread_t * th, VALUE iseqval, const NODE *cref); - -static inline VALUE -vm_call0(rb_thread_t * th, VALUE klass, VALUE recv, VALUE id, ID oid, - int argc, const VALUE *argv, const NODE *body, int nosuper) -{ - VALUE val; - rb_block_t *blockptr = 0; - - if (0) printf("id: %s, nd: %s, argc: %d, passed: %p\n", - rb_id2name(id), ruby_node_name(nd_type(body)), - argc, th->passed_block); - - if (th->passed_block) { - blockptr = th->passed_block; - th->passed_block = 0; - } - switch (nd_type(body)) { - case RUBY_VM_METHOD_NODE:{ - rb_control_frame_t *reg_cfp; - VALUE iseqval = (VALUE)body->nd_body; - int i; - - rb_vm_set_finish_env(th); - reg_cfp = th->cfp; - - CHECK_STACK_OVERFLOW(reg_cfp, argc + 1); - - *reg_cfp->sp++ = recv; - for (i = 0; i < argc; i++) { - *reg_cfp->sp++ = argv[i]; - } - - vm_setup_method(th, reg_cfp, argc, blockptr, 0, iseqval, recv, klass); - val = vm_eval_body(th); - break; - } - case NODE_CFUNC: { - EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, id, klass); - { - rb_control_frame_t *reg_cfp = th->cfp; - rb_control_frame_t *cfp = - vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC, - recv, (VALUE)blockptr, 0, reg_cfp->sp, 0, 1); - - cfp->method_id = id; - cfp->method_class = klass; - - val = call_cfunc(body->nd_cfnc, recv, body->nd_argc, argc, argv); - - if (reg_cfp != th->cfp + 1) { - SDR2(reg_cfp); - SDR2(th->cfp-5); - rb_bug("cfp consistency error - call0"); - th->cfp = reg_cfp; - } - vm_pop_frame(th); - } - EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, id, klass); - break; - } - case NODE_ATTRSET:{ - if (argc != 1) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc); - } - val = rb_ivar_set(recv, body->nd_vid, argv[0]); - break; - } - case NODE_IVAR: { - if (argc != 0) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", - argc); - } - val = rb_attr_get(recv, body->nd_vid); - break; - } - case NODE_BMETHOD:{ - val = vm_call_bmethod(th, id, body->nd_cval, - recv, klass, argc, (VALUE *)argv, blockptr); - break; - } - default: - rb_bug("unsupported: vm_call0(%s)", ruby_node_name(nd_type(body))); - } - RUBY_VM_CHECK_INTS(); - return val; -} - -VALUE -rb_vm_call(rb_thread_t * th, VALUE klass, VALUE recv, VALUE id, ID oid, - int argc, const VALUE *argv, const NODE *body, int nosuper) -{ - return vm_call0(th, klass, recv, id, oid, argc, argv, body, nosuper); -} - -static inline VALUE -vm_call_super(rb_thread_t * const th, const int argc, const VALUE * const argv) -{ - VALUE recv = th->cfp->self; - VALUE klass; - ID id; - NODE *body; - rb_control_frame_t *cfp = th->cfp; - - if (!cfp->iseq) { - klass = cfp->method_class; - klass = RCLASS_SUPER(klass); - - if (klass == 0) { - klass = vm_search_normal_superclass(cfp->method_class, recv); - } - - id = cfp->method_id; - } - else { - rb_bug("vm_call_super: should not be reached"); - } - - body = rb_method_node(klass, id); /* this returns NODE_METHOD */ - - if (body) { - body = body->nd_body; - } - else { - VALUE *argv_m, result, argv_ary = 0; - if (argc < 0x100) { - argv_m = ALLOCA_N(VALUE, argc+1); - } - else { - argv_ary = rb_ary_tmp_new(argc+1); - argv_m = RARRAY_PTR(argv_ary); - } - MEMCPY(argv_m + 1, argv, VALUE, argc); - argv_m[0] = ID2SYM(id); - th->method_missing_reason = 0; - th->passed_block = 0; - result = rb_funcall2(recv, idMethodMissing, argc + 1, argv_m); - if (argv_ary) rb_ary_clear(argv_ary); - return result; - } - - return vm_call0(th, klass, recv, id, id, argc, argv, body, CALL_SUPER); -} - -VALUE -rb_call_super(int argc, const VALUE *argv) -{ - PASS_PASSED_BLOCK(); - return vm_call_super(GET_THREAD(), argc, argv); -} - -static inline void -stack_check(void) -{ - rb_thread_t *th = GET_THREAD(); - - if (!rb_thread_raised_p(th, RAISED_STACKOVERFLOW) && ruby_stack_check()) { - rb_thread_raised_set(th, RAISED_STACKOVERFLOW); - rb_exc_raise(sysstack_error); - } -} - -static inline VALUE -rb_call0(VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, - int scope, VALUE self) -{ - NODE *body, *method; - int noex; - ID id = mid; - struct cache_entry *ent; - rb_thread_t *th = GET_THREAD(); - - if (!klass) { - rb_raise(rb_eNotImpError, - "method `%s' called on terminated object (%p)", - rb_id2name(mid), (void *)recv); - } - /* is it in the method cache? */ - ent = cache + EXPR1(klass, mid); - - if (ent->mid == mid && ent->klass == klass) { - if (!ent->method) - return method_missing(recv, mid, argc, argv, - scope == 2 ? NOEX_VCALL : 0); - id = ent->mid0; - noex = ent->method->nd_noex; - klass = ent->method->nd_clss; - body = ent->method->nd_body; - } - else if ((method = rb_get_method_body(klass, id, &id)) != 0) { - noex = method->nd_noex; - klass = method->nd_clss; - body = method->nd_body; - } - else { - if (scope == 3) { - return method_missing(recv, mid, argc, argv, NOEX_SUPER); - } - return method_missing(recv, mid, argc, argv, - scope == 2 ? NOEX_VCALL : 0); - } - - - if (mid != missing) { - /* receiver specified form for private method */ - if (UNLIKELY(noex)) { - if (((noex & NOEX_MASK) & NOEX_PRIVATE) && scope == 0) { - return method_missing(recv, mid, argc, argv, NOEX_PRIVATE); - } - - /* self must be kind of a specified form for protected method */ - if (((noex & NOEX_MASK) & NOEX_PROTECTED) && scope == 0) { - VALUE defined_class = klass; - - if (TYPE(defined_class) == T_ICLASS) { - defined_class = RBASIC(defined_class)->klass; - } - - if (self == Qundef) { - self = th->cfp->self; - } - if (!rb_obj_is_kind_of(self, rb_class_real(defined_class))) { - return method_missing(recv, mid, argc, argv, NOEX_PROTECTED); - } - } - - if (NOEX_SAFE(noex) > th->safe_level) { - rb_raise(rb_eSecurityError, "calling insecure method: %s", rb_id2name(mid)); - } - } - } - - stack_check(); - return vm_call0(th, klass, recv, mid, id, argc, argv, body, noex & NOEX_NOSUPER); -} - -static inline VALUE -rb_call(VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, int scope) -{ - return rb_call0(klass, recv, mid, argc, argv, scope, Qundef); -} - -/* - * call-seq: - * obj.method_missing(symbol [, *args] ) => result - * - * Invoked by Ruby when <i>obj</i> is sent a message it cannot handle. - * <i>symbol</i> is the symbol for the method called, and <i>args</i> - * are any arguments that were passed to it. By default, the interpreter - * raises an error when this method is called. However, it is possible - * to override the method to provide more dynamic behavior. - * If it is decided that a particular method should not be handled, then - * <i>super</i> should be called, so that ancestors can pick up the - * missing method. - * The example below creates - * a class <code>Roman</code>, which responds to methods with names - * consisting of roman numerals, returning the corresponding integer - * values. - * - * class Roman - * def romanToInt(str) - * # ... - * end - * def method_missing(methId) - * str = methId.id2name - * romanToInt(str) - * end - * end - * - * r = Roman.new - * r.iv #=> 4 - * r.xxiii #=> 23 - * r.mm #=> 2000 - */ - -static VALUE -rb_method_missing(int argc, const VALUE *argv, VALUE obj) -{ - ID id; - VALUE exc = rb_eNoMethodError; - const char *format = 0; - rb_thread_t *th = GET_THREAD(); - int last_call_status = th->method_missing_reason; - if (argc == 0 || !SYMBOL_P(argv[0])) { - rb_raise(rb_eArgError, "no id given"); - } - - stack_check(); - - id = SYM2ID(argv[0]); - - if (last_call_status & NOEX_PRIVATE) { - format = "private method `%s' called for %s"; - } - else if (last_call_status & NOEX_PROTECTED) { - format = "protected method `%s' called for %s"; - } - else if (last_call_status & NOEX_VCALL) { - format = "undefined local variable or method `%s' for %s"; - exc = rb_eNameError; - } - else if (last_call_status & NOEX_SUPER) { - format = "super: no superclass method `%s' for %s"; - } - if (!format) { - format = "undefined method `%s' for %s"; - } - - { - int n = 0; - VALUE args[3]; - args[n++] = rb_funcall(rb_const_get(exc, rb_intern("message")), '!', - 3, rb_str_new2(format), obj, argv[0]); - args[n++] = argv[0]; - if (exc == rb_eNoMethodError) { - args[n++] = rb_ary_new4(argc - 1, argv + 1); - } - exc = rb_class_new_instance(n, args, exc); - - th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp); - rb_exc_raise(exc); - } - - return Qnil; /* not reached */ -} - -static inline VALUE -method_missing(VALUE obj, ID id, int argc, const VALUE *argv, int call_status) -{ - VALUE *nargv; - GET_THREAD()->method_missing_reason = call_status; - - if (id == missing) { - rb_method_missing(argc, argv, obj); - } - else if (id == ID_ALLOCATOR) { - rb_raise(rb_eTypeError, "allocator undefined for %s", - rb_class2name(obj)); - } - - nargv = ALLOCA_N(VALUE, argc + 1); - nargv[0] = ID2SYM(id); - MEMCPY(nargv + 1, argv, VALUE, argc); - - return rb_funcall2(obj, missing, argc + 1, nargv); -} - -VALUE -rb_apply(VALUE recv, ID mid, VALUE args) -{ - int argc; - VALUE *argv; - - argc = RARRAY_LEN(args); /* Assigns LONG, but argc is INT */ - argv = ALLOCA_N(VALUE, argc); - MEMCPY(argv, RARRAY_PTR(args), VALUE, argc); - return rb_call(CLASS_OF(recv), recv, mid, argc, argv, CALL_FCALL); -} - -VALUE -rb_funcall(VALUE recv, ID mid, int n, ...) -{ - VALUE *argv; - va_list ar; - va_init_list(ar, n); - - if (n > 0) { - long i; - - argv = ALLOCA_N(VALUE, n); - - for (i = 0; i < n; i++) { - argv[i] = va_arg(ar, VALUE); - } - va_end(ar); - } - else { - argv = 0; - } - return rb_call(CLASS_OF(recv), recv, mid, n, argv, CALL_FCALL); -} - -VALUE -rb_funcall2(VALUE recv, ID mid, int argc, const VALUE *argv) -{ - return rb_call(CLASS_OF(recv), recv, mid, argc, argv, CALL_FCALL); -} - -VALUE -rb_funcall3(VALUE recv, ID mid, int argc, const VALUE *argv) -{ - return rb_call(CLASS_OF(recv), recv, mid, argc, argv, CALL_PUBLIC); -} - -static VALUE -send_internal(int argc, VALUE *argv, VALUE recv, int scope) -{ - VALUE vid; - VALUE self = RUBY_VM_PREVIOUS_CONTROL_FRAME(GET_THREAD()->cfp)->self; - rb_thread_t *th = GET_THREAD(); - - if (argc == 0) { - rb_raise(rb_eArgError, "no method name given"); - } - - vid = *argv++; argc--; - PASS_PASSED_BLOCK_TH(th); - - return rb_call0(CLASS_OF(recv), recv, rb_to_id(vid), argc, argv, scope, self); -} - -/* - * call-seq: - * obj.send(symbol [, args...]) => obj - * obj.__send__(symbol [, args...]) => obj - * - * Invokes the method identified by _symbol_, passing it any - * arguments specified. You can use <code>__send__</code> if the name - * +send+ clashes with an existing method in _obj_. - * - * class Klass - * def hello(*args) - * "Hello " + args.join(' ') - * end - * end - * k = Klass.new - * k.send :hello, "gentle", "readers" #=> "Hello gentle readers" - */ - -VALUE -rb_f_send(int argc, VALUE *argv, VALUE recv) -{ - return send_internal(argc, argv, recv, NOEX_NOSUPER | NOEX_PRIVATE); -} - -/* - * call-seq: - * obj.public_send(symbol [, args...]) => obj - * - * Invokes the method identified by _symbol_, passing it any - * arguments specified. Unlike send, public_send calls public - * methods only. - * - * 1.public_send(:puts, "hello") # causes NoMethodError - */ - -VALUE -rb_f_public_send(int argc, VALUE *argv, VALUE recv) -{ - return send_internal(argc, argv, recv, NOEX_PUBLIC); -} - -/* yield */ - -static inline VALUE -rb_yield_0(int argc, const VALUE * argv) -{ - return vm_yield(GET_THREAD(), argc, argv); -} - -VALUE -rb_yield(VALUE val) -{ - if (val == Qundef) { - return rb_yield_0(0, 0); - } - else { - return rb_yield_0(1, &val); - } -} - -VALUE -rb_yield_values(int n, ...) -{ - if (n == 0) { - return rb_yield_0(0, 0); - } - else { - int i; - VALUE *argv; - va_list args; - argv = ALLOCA_N(VALUE, n); - - va_init_list(args, n); - for (i=0; i<n; i++) { - argv[i] = va_arg(args, VALUE); - } - va_end(args); - - return rb_yield_0(n, argv); - } -} - -VALUE -rb_yield_values2(int argc, const VALUE *argv) -{ - return rb_yield_0(argc, argv); -} - -VALUE -rb_yield_splat(VALUE values) -{ - VALUE tmp = rb_check_array_type(values); - volatile VALUE v; - if (NIL_P(tmp)) { - rb_raise(rb_eArgError, "not an array"); - } - v = rb_yield_0(RARRAY_LEN(tmp), RARRAY_PTR(tmp)); - return v; -} - -static VALUE -loop_i(void) -{ - for (;;) { - rb_yield_0(0, 0); - } - return Qnil; -} - -/* - * call-seq: - * loop {|| block } - * - * Repeatedly executes the block. - * - * loop do - * print "Input: " - * line = gets - * break if !line or line =~ /^qQ/ - * # ... - * end - * - * StopIteration raised in the block breaks the loop. - */ - -static VALUE -rb_f_loop(void) -{ - rb_rescue2(loop_i, (VALUE)0, 0, 0, rb_eStopIteration, (VALUE)0); - return Qnil; /* dummy */ -} - -VALUE -rb_iterate(VALUE (* it_proc) (VALUE), VALUE data1, - VALUE (* bl_proc) (ANYARGS), VALUE data2) -{ - int state; - volatile VALUE retval = Qnil; - NODE *node = NEW_IFUNC(bl_proc, data2); - rb_thread_t *th = GET_THREAD(); - rb_control_frame_t *cfp = th->cfp; - - TH_PUSH_TAG(th); - state = TH_EXEC_TAG(); - if (state == 0) { - iter_retry: - { - rb_block_t *blockptr = RUBY_VM_GET_BLOCK_PTR_IN_CFP(th->cfp); - blockptr->iseq = (void *)node; - blockptr->proc = 0; - th->passed_block = blockptr; - } - retval = (*it_proc) (data1); - } - else { - VALUE err = th->errinfo; - if (state == TAG_BREAK) { - VALUE *escape_dfp = GET_THROWOBJ_CATCH_POINT(err); - VALUE *cdfp = cfp->dfp; - - if (cdfp == escape_dfp) { - state = 0; - th->state = 0; - th->errinfo = Qnil; - th->cfp = cfp; - } - else{ - /* SDR(); printf("%p, %p\n", cdfp, escape_dfp); */ - } - } - else if (state == TAG_RETRY) { - VALUE *escape_dfp = GET_THROWOBJ_CATCH_POINT(err); - VALUE *cdfp = cfp->dfp; - - if (cdfp == escape_dfp) { - state = 0; - th->state = 0; - th->errinfo = Qnil; - th->cfp = cfp; - goto iter_retry; - } - } - } - TH_POP_TAG(); - - switch (state) { - case 0: - break; - default: - TH_JUMP_TAG(th, state); - } - return retval; -} - -struct iter_method_arg { - VALUE obj; - ID mid; - int argc; - VALUE *argv; -}; - -static VALUE -iterate_method(VALUE obj) -{ - const struct iter_method_arg * arg = - (struct iter_method_arg *) obj; - - return rb_call(CLASS_OF(arg->obj), arg->obj, arg->mid, - arg->argc, arg->argv, CALL_FCALL); -} - -VALUE -rb_block_call(VALUE obj, ID mid, int argc, VALUE * argv, - VALUE (*bl_proc) (ANYARGS), VALUE data2) -{ - struct iter_method_arg arg; - - arg.obj = obj; - arg.mid = mid; - arg.argc = argc; - arg.argv = argv; - return rb_iterate(iterate_method, (VALUE)&arg, bl_proc, data2); -} - -VALUE -rb_each(VALUE obj) -{ - return rb_call(CLASS_OF(obj), obj, idEach, 0, 0, CALL_FCALL); -} - -static VALUE -eval_string_with_cref(VALUE self, VALUE src, VALUE scope, NODE *cref, const char *file, int line) -{ - int state; - VALUE result = Qundef; - VALUE envval; - rb_binding_t *bind = 0; - rb_thread_t *th = GET_THREAD(); - rb_env_t *env = NULL; - rb_block_t block; - volatile int parse_in_eval; - volatile int mild_compile_error; - - if (file == 0) { - file = rb_sourcefile(); - line = rb_sourceline(); - } - - parse_in_eval = th->parse_in_eval; - mild_compile_error = th->mild_compile_error; - PUSH_TAG(); - if ((state = EXEC_TAG()) == 0) { - rb_iseq_t *iseq; - volatile VALUE iseqval; - - if (scope != Qnil) { - if (rb_obj_is_kind_of(scope, rb_cBinding)) { - GetBindingPtr(scope, bind); - envval = bind->env; - } - else { - rb_raise(rb_eTypeError, - "wrong argument type %s (expected Binding)", - rb_obj_classname(scope)); - } - GetEnvPtr(envval, env); - th->base_block = &env->block; - } - else { - rb_control_frame_t *cfp = vm_get_ruby_level_caller_cfp(th, th->cfp); - - if (cfp != 0) { - block = *RUBY_VM_GET_BLOCK_PTR_IN_CFP(cfp); - th->base_block = █ - th->base_block->self = self; - th->base_block->iseq = cfp->iseq; /* TODO */ - } - else { - rb_raise(rb_eRuntimeError, "Can't eval on top of Fiber or Thread"); - } - } - - /* make eval iseq */ - th->parse_in_eval++; - th->mild_compile_error++; - iseqval = rb_iseq_compile(src, rb_str_new2(file), INT2FIX(line)); - th->mild_compile_error--; - th->parse_in_eval--; - - vm_set_eval_stack(th, iseqval, cref); - th->base_block = 0; - - if (0) { /* for debug */ - extern VALUE ruby_iseq_disasm(VALUE); - printf("%s\n", RSTRING_PTR(ruby_iseq_disasm(iseqval))); - } - - /* save new env */ - GetISeqPtr(iseqval, iseq); - if (bind && iseq->local_size > 0) { - bind->env = vm_make_env_object(th, th->cfp); - } - - /* kick */ - CHECK_STACK_OVERFLOW(th->cfp, iseq->stack_max); - result = vm_eval_body(th); - } - POP_TAG(); - th->mild_compile_error = mild_compile_error; - th->parse_in_eval = parse_in_eval; - - if (state) { - if (state == TAG_RAISE) { - VALUE errinfo = th->errinfo; - if (strcmp(file, "(eval)") == 0) { - VALUE mesg, errat, bt2; - extern VALUE rb_get_backtrace(VALUE info); - - errat = rb_get_backtrace(errinfo); - mesg = rb_attr_get(errinfo, rb_intern("mesg")); - if (!NIL_P(errat) && TYPE(errat) == T_ARRAY && - (bt2 = vm_backtrace(th, -2), RARRAY_LEN(bt2) > 0)) { - if (!NIL_P(mesg) && TYPE(mesg) == T_STRING && !RSTRING_LEN(mesg)) { - rb_str_update(mesg, 0, 0, rb_str_new2(": ")); - rb_str_update(mesg, 0, 0, RARRAY_PTR(errat)[0]); - } - RARRAY_PTR(errat)[0] = RARRAY_PTR(bt2)[0]; - } - } - rb_exc_raise(errinfo); - } - JUMP_TAG(state); - } - return result; -} - -static VALUE -eval_string(VALUE self, VALUE src, VALUE scope, const char *file, int line) -{ - return eval_string_with_cref(self, src, scope, 0, file, line); -} - -/* - * call-seq: - * eval(string [, binding [, filename [,lineno]]]) => obj - * - * Evaluates the Ruby expression(s) in <em>string</em>. If - * <em>binding</em> is given, the evaluation is performed in its - * context. The binding may be a <code>Binding</code> object or a - * <code>Proc</code> object. If the optional <em>filename</em> and - * <em>lineno</em> parameters are present, they will be used when - * reporting syntax errors. - * - * def getBinding(str) - * return binding - * end - * str = "hello" - * eval "str + ' Fred'" #=> "hello Fred" - * eval "str + ' Fred'", getBinding("bye") #=> "bye Fred" - */ - -VALUE -rb_f_eval(int argc, VALUE *argv, VALUE self) -{ - VALUE src, scope, vfile, vline; - const char *file = "(eval)"; - int line = 1; - - rb_scan_args(argc, argv, "13", &src, &scope, &vfile, &vline); - if (rb_safe_level() >= 4) { - StringValue(src); - if (!NIL_P(scope) && !OBJ_TAINTED(scope)) { - rb_raise(rb_eSecurityError, - "Insecure: can't modify trusted binding"); - } - } - else { - SafeStringValue(src); - } - if (argc >= 3) { - StringValue(vfile); - } - if (argc >= 4) { - line = NUM2INT(vline); - } - - if (!NIL_P(vfile)) - file = RSTRING_PTR(vfile); - return eval_string(self, src, scope, file, line); -} - -VALUE -rb_eval_string(const char *str) -{ - return eval_string(rb_vm_top_self(), rb_str_new2(str), Qnil, "(eval)", 1); -} - -VALUE -rb_eval_string_protect(const char *str, int *state) -{ - return rb_protect((VALUE (*)(VALUE))rb_eval_string, (VALUE)str, state); -} - -VALUE -rb_eval_string_wrap(const char *str, int *state) -{ - int status; - rb_thread_t *th = GET_THREAD(); - VALUE self = th->top_self; - VALUE wrapper = th->top_wrapper; - VALUE val; - - th->top_wrapper = rb_module_new(); - th->top_self = rb_obj_clone(rb_vm_top_self()); - rb_extend_object(th->top_self, th->top_wrapper); - - val = rb_eval_string_protect(str, &status); - - th->top_self = self; - th->top_wrapper = wrapper; - - if (state) { - *state = status; - } - else if (status) { - JUMP_TAG(status); - } - return val; -} - -VALUE -rb_eval_cmd(VALUE cmd, VALUE arg, int level) -{ - int state; - VALUE val = Qnil; /* OK */ - volatile int safe = rb_safe_level(); - - if (OBJ_TAINTED(cmd)) { - level = 4; - } - - if (TYPE(cmd) != T_STRING) { - PUSH_TAG(); - rb_set_safe_level_force(level); - if ((state = EXEC_TAG()) == 0) { - val = rb_funcall2(cmd, rb_intern("call"), RARRAY_LEN(arg), - RARRAY_PTR(arg)); - } - POP_TAG(); - - rb_set_safe_level_force(safe); - - if (state) - JUMP_TAG(state); - return val; - } - - PUSH_TAG(); - if ((state = EXEC_TAG()) == 0) { - val = eval_string(rb_vm_top_self(), cmd, Qnil, 0, 0); - } - POP_TAG(); - - rb_set_safe_level_force(safe); - if (state) vm_jump_tag_but_local_jump(state, val); - return val; -} - -/* block eval under the class/module context */ - -static VALUE -yield_under(VALUE under, VALUE self, VALUE values) -{ - rb_thread_t *th = GET_THREAD(); - rb_block_t block, *blockptr; - NODE *cref = vm_cref_push(th, under, NOEX_PUBLIC); - - if ((blockptr = GC_GUARDED_PTR_REF(th->cfp->lfp[0])) != 0) { - block = *blockptr; - block.self = self; - th->cfp->lfp[0] = GC_GUARDED_PTR(&block); - } - - if (values == Qundef) { - return vm_yield_with_cref(th, 0, 0, cref); - } - else { - return vm_yield_with_cref(th, RARRAY_LEN(values), RARRAY_PTR(values), cref); - } -} - -/* string eval under the class/module context */ -static VALUE -eval_under(VALUE under, VALUE self, VALUE src, const char *file, int line) -{ - NODE *cref = vm_cref_push(GET_THREAD(), under, NOEX_PUBLIC); - - if (rb_safe_level() >= 4) { - StringValue(src); - } - else { - SafeStringValue(src); - } - - return eval_string_with_cref(self, src, Qnil, cref, file, line); -} - -static VALUE -specific_eval(int argc, VALUE *argv, VALUE klass, VALUE self) -{ - if (rb_block_given_p()) { - if (argc > 0) { - rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", argc); - } - return yield_under(klass, self, Qundef); - } - else { - const char *file = "(eval)"; - int line = 1; - - if (argc == 0) { - rb_raise(rb_eArgError, "block not supplied"); - } - else { - if (rb_safe_level() >= 4) { - StringValue(argv[0]); - } - else { - SafeStringValue(argv[0]); - } - if (argc > 3) { - const char *name = rb_id2name(rb_frame_callee()); - rb_raise(rb_eArgError, - "wrong number of arguments: %s(src) or %s{..}", - name, name); - } - if (argc > 2) - line = NUM2INT(argv[2]); - if (argc > 1) { - file = StringValuePtr(argv[1]); - } - } - return eval_under(klass, self, argv[0], file, line); - } -} - -/* - * call-seq: - * obj.instance_eval(string [, filename [, lineno]] ) => obj - * obj.instance_eval {| | block } => obj - * - * Evaluates a string containing Ruby source code, or the given block, - * within the context of the receiver (_obj_). In order to set the - * context, the variable +self+ is set to _obj_ while - * the code is executing, giving the code access to _obj_'s - * instance variables. In the version of <code>instance_eval</code> - * that takes a +String+, the optional second and third - * parameters supply a filename and starting line number that are used - * when reporting compilation errors. - * - * class KlassWithSecret - * def initialize - * @secret = 99 - * end - * end - * k = KlassWithSecret.new - * k.instance_eval { @secret } #=> 99 - */ - -VALUE -rb_obj_instance_eval(int argc, VALUE *argv, VALUE self) -{ - VALUE klass; - - if (SPECIAL_CONST_P(self)) { - klass = Qnil; - } - else { - klass = rb_singleton_class(self); - } - return specific_eval(argc, argv, klass, self); -} - -/* - * call-seq: - * obj.instance_exec(arg...) {|var...| block } => obj - * - * Executes the given block within the context of the receiver - * (_obj_). In order to set the context, the variable +self+ is set - * to _obj_ while the code is executing, giving the code access to - * _obj_'s instance variables. Arguments are passed as block parameters. - * - * class KlassWithSecret - * def initialize - * @secret = 99 - * end - * end - * k = KlassWithSecret.new - * k.instance_exec(5) {|x| @secret+x } #=> 104 - */ - -VALUE -rb_obj_instance_exec(int argc, VALUE *argv, VALUE self) -{ - VALUE klass; - - if (SPECIAL_CONST_P(self)) { - klass = Qnil; - } - else { - klass = rb_singleton_class(self); - } - return yield_under(klass, self, rb_ary_new4(argc, argv)); -} - -/* - * call-seq: - * mod.class_eval(string [, filename [, lineno]]) => obj - * mod.module_eval {|| block } => obj - * - * Evaluates the string or block in the context of _mod_. This can - * be used to add methods to a class. <code>module_eval</code> returns - * the result of evaluating its argument. The optional _filename_ - * and _lineno_ parameters set the text for error messages. - * - * class Thing - * end - * a = %q{def hello() "Hello there!" end} - * Thing.module_eval(a) - * puts Thing.new.hello() - * Thing.module_eval("invalid code", "dummy", 123) - * - * <em>produces:</em> - * - * Hello there! - * dummy:123:in `module_eval': undefined local variable - * or method `code' for Thing:Class - */ - -VALUE -rb_mod_module_eval(int argc, VALUE *argv, VALUE mod) -{ - return specific_eval(argc, argv, mod, mod); -} - -/* - * call-seq: - * mod.module_exec(arg...) {|var...| block } => obj - * mod.class_exec(arg...) {|var...| block } => obj - * - * Evaluates the given block in the context of the class/module. - * The method defined in the block will belong to the receiver. - * - * class Thing - * end - * Thing.class_exec{ - * def hello() "Hello there!" end - * } - * puts Thing.new.hello() - * - * <em>produces:</em> - * - * Hello there! - */ - -VALUE -rb_mod_module_exec(int argc, VALUE *argv, VALUE mod) -{ - return yield_under(mod, mod, rb_ary_new4(argc, argv)); -} - -NORETURN(static VALUE rb_f_throw _((int, VALUE *))); - -/* - * call-seq: - * throw(symbol [, obj]) - * - * Transfers control to the end of the active +catch+ block - * waiting for _symbol_. Raises +NameError+ if there - * is no +catch+ block for the symbol. The optional second - * parameter supplies a return value for the +catch+ block, - * which otherwise defaults to +nil+. For examples, see - * <code>Kernel::catch</code>. - */ - -static VALUE -rb_f_throw(int argc, VALUE *argv) -{ - VALUE tag, value; - rb_thread_t *th = GET_THREAD(); - struct rb_vm_tag *tt = th->tag; - - rb_scan_args(argc, argv, "11", &tag, &value); - while (tt) { - if (tt->tag == tag) { - tt->retval = value; - break; - } - tt = tt->prev; - } - if (!tt) { - VALUE desc = rb_inspect(tag); - rb_raise(rb_eArgError, "uncaught throw %s", RSTRING_PTR(desc)); - } - rb_trap_restore_mask(); - th->errinfo = NEW_THROW_OBJECT(tag, 0, TAG_THROW); - - JUMP_TAG(TAG_THROW); -#ifndef __GNUC__ - return Qnil; /* not reached */ -#endif -} - -void -rb_throw(const char *tag, VALUE val) -{ - VALUE argv[2]; - - argv[0] = ID2SYM(rb_intern(tag)); - argv[1] = val; - rb_f_throw(2, argv); -} - -void -rb_throw_obj(VALUE tag, VALUE val) -{ - VALUE argv[2]; - - argv[0] = tag; - argv[1] = val; - rb_f_throw(2, argv); -} - -/* - * call-seq: - * catch(symbol) {| | block } > obj - * - * +catch+ executes its block. If a +throw+ is - * executed, Ruby searches up its stack for a +catch+ block - * with a tag corresponding to the +throw+'s - * _symbol_. If found, that block is terminated, and - * +catch+ returns the value given to +throw+. If - * +throw+ is not called, the block terminates normally, and - * the value of +catch+ is the value of the last expression - * evaluated. +catch+ expressions may be nested, and the - * +throw+ call need not be in lexical scope. - * - * def routine(n) - * puts n - * throw :done if n <= 0 - * routine(n-1) - * end - * - * - * catch(:done) { routine(3) } - * - * <em>produces:</em> - * - * 3 - * 2 - * 1 - * 0 - */ - -static VALUE -rb_f_catch(int argc, VALUE *argv) -{ - VALUE tag; - int state; - VALUE val = Qnil; /* OK */ - rb_thread_t *th = GET_THREAD(); - rb_control_frame_t *saved_cfp = th->cfp; - - if (argc == 0) { - tag = rb_obj_alloc(rb_cObject); - } - else { - rb_scan_args(argc, argv, "01", &tag); - } - PUSH_TAG(); - - th->tag->tag = tag; - - if ((state = EXEC_TAG()) == 0) { - val = rb_yield_0(1, &tag); - } - else if (state == TAG_THROW && RNODE(th->errinfo)->u1.value == tag) { - th->cfp = saved_cfp; - val = th->tag->retval; - th->errinfo = Qnil; - state = 0; - } - POP_TAG(); - if (state) - JUMP_TAG(state); - - return val; -} - -static VALUE -catch_null_i(VALUE dmy) -{ - return rb_funcall(Qnil, rb_intern("catch"), 0, 0); -} - -static VALUE -catch_i(VALUE tag) -{ - return rb_funcall(Qnil, rb_intern("catch"), 1, tag); -} - -VALUE -rb_catch(const char *tag, VALUE (*func)(), VALUE data) -{ - if (!tag) { - return rb_iterate(catch_null_i, 0, func, data); - } - return rb_iterate(catch_i, ID2SYM(rb_intern(tag)), func, data); -} - -VALUE -rb_catch_obj(VALUE tag, VALUE (*func)(), VALUE data) -{ - return rb_iterate((VALUE (*)_((VALUE)))catch_i, tag, func, data); -} - -/* - * call-seq: - * caller(start=1) => array - * - * Returns the current execution stack---an array containing strings in - * the form ``<em>file:line</em>'' or ``<em>file:line: in - * `method'</em>''. The optional _start_ parameter - * determines the number of initial stack entries to omit from the - * result. - * - * def a(skip) - * caller(skip) - * end - * def b(skip) - * a(skip) - * end - * def c(skip) - * b(skip) - * end - * c(0) #=> ["prog:2:in `a'", "prog:5:in `b'", "prog:8:in `c'", "prog:10"] - * c(1) #=> ["prog:5:in `b'", "prog:8:in `c'", "prog:11"] - * c(2) #=> ["prog:8:in `c'", "prog:12"] - * c(3) #=> ["prog:13"] - */ - -static VALUE -rb_f_caller(int argc, VALUE *argv) -{ - VALUE level; - int lev; - - rb_scan_args(argc, argv, "01", &level); - - if (NIL_P(level)) - lev = 1; - else - lev = NUM2INT(level); - if (lev < 0) - rb_raise(rb_eArgError, "negative level (%d)", lev); - - return vm_backtrace(GET_THREAD(), lev); -} - -void -rb_backtrace(void) -{ - long i; - VALUE ary; - - ary = vm_backtrace(GET_THREAD(), -1); - for (i = 0; i < RARRAY_LEN(ary); i++) { - printf("\tfrom %s\n", RSTRING_PTR(RARRAY_PTR(ary)[i])); - } -} - -VALUE -rb_make_backtrace(void) -{ - return vm_backtrace(GET_THREAD(), -1); -} - -void -Init_vm_eval(void) -{ - rb_define_global_function("catch", rb_f_catch, -1); - rb_define_global_function("throw", rb_f_throw, -1); - - rb_define_global_function("loop", rb_f_loop, 0); - - rb_define_method(rb_cBasicObject, "instance_eval", rb_obj_instance_eval, -1); - rb_define_method(rb_cBasicObject, "instance_exec", rb_obj_instance_exec, -1); - rb_define_private_method(rb_cBasicObject, "method_missing", rb_method_missing, -1); - - rb_define_method(rb_cBasicObject, "__send__", rb_f_send, -1); - rb_define_method(rb_mKernel, "send", rb_f_send, -1); - rb_define_method(rb_mKernel, "public_send", rb_f_public_send, -1); - - rb_define_method(rb_cModule, "module_exec", rb_mod_module_exec, -1); - rb_define_method(rb_cModule, "class_exec", rb_mod_module_exec, -1); - - rb_define_global_function("caller", rb_f_caller, -1); -} - |